Question

on germination each zygorespore of spirogyra gives rise to how many plants? plz explain

Answer 1

Answer:

Thus in Spirogyra, each zygospore on germination gives rise to the single filament.

is it ok orr not....???????

Answer 2

Answer:

Spirogyra is a cosmopolitan, freshwater, filamentous green alga, represented by about 300 species. Most of them are green floating in stagnant ponds and pools, a few species are attached and some occur in running water (S. adnata). It was discovered by Link. Spirogyra is commonly known as pond silk, water silk, pond scum or mermaid’s trees because of their bright green silky appearance.Each cell of Spirogyra filament is cylindrical and consists of 2 parts: cell wall and protoplast. The cell wall surrounds the protoplast, is protective and consists of two layers i.e. inner cellulose layer and outer pectose layer. The pectose layer dissolves in water to form a slimy mucilage sheath covering the whole filament. The transverse wall (cross wall) between adjacent cells has middle lamella (septum). The cross wall maybe plane, replicate or colligate. In replicate type, the middle lamella forms two ring ­like ingrowths while in colligate type H-shaped pieces develop near middle lamella.